[PDF] Top 20 A Parallel Evolution Strategy for Acoustic Full-Waveform Inversion

... Motivated by the recent growth of high performance computing HPC, we will try to tackle the high non-linearity of the problem to minimize, using global optimization methods which are eas[r] ... Voir le document complet

... model for FWI [34, 45]. In this paper we propose a novel approach to find an initial smooth velocity model for the full-waveform inversion problem without any a priori ... Voir le document complet

... allow for the computationally-efficient processing of a large number of sources and receivers with limited computational resources thanks to the efficiency of the substitution step performed by the ... Voir le document complet

... also aect the utilizable ...Measurements for higher frequencies were also inuenced to some extent by the inherent heterogeneities present in the sandbox, including slight surface rough- ...ness. ... Voir le document complet

... ON FULL-WAVEFORM LIDAR DATA Airborne lidar systems (ALS) provide 3D point clouds of the topography by direct time measurement of a short laser pulse after reflection on the Earth ...surface. ... Voir le document complet

... as a high throughput technology need efficient primers or probes ...only a small part of the microbial diversity is known, gene sequences deposited in international databases do not reflect the entire ... Voir le document complet

... promising for GPR techniques. In this regard, this abstract shows first a synthetic ethanol tracer test monitored by GPR ...using a realistic aquifer model of the Krauthausen test site in Germany [6, ... Voir le document complet

... in a 2-D medium using either single-component data or multicomponent ...domain full wave equation by a finite difference scheme different from the one already used by Stekl & Pratt (1998) or by ... Voir le document complet

... anomalies for the V p and V s ...as a series of independent simple ...as a series of neighbouring hyperbolae due to the presence of simple ...seismograms for the vertical component, a ... Voir le document complet

... In order to determine a reasonably high upper limit for the effects of stress relaxation or a minor amount of hole deterioration, a synthetic seismogram was generated for an elliptic bor[r] ... Voir le document complet

... A Reconfiguration Strategy for Reconfigurable Cable-Driven Parallel Robots Lorenzo Gagliardini 1 , Stéphane Caro 2 , Marc Gouttefarde 3 and Alexis Girin 1 Abstract— This paper deals with ... Voir le document complet

... For inversion 3, the initial velocity models are the same as for inversion 2 (Figure ...compensate for the strong density ...similar for P-P diffractions at short ...showing ... Voir le document complet

... systems, full-waveform systems are able to digitize and record the entire backscattered signal of each laser ...into a mixture of Gaussian components was ...to waveform processing was ...as ... Voir le document complet

... cation in recent years, and these advances have greatly increased the capability of log analysts to measure the physical properties of formations. Advances in theory provide the analytic[r] ... Voir le document complet

... where a mesh, that approximates sufficiently the geometry, is not fine enough to comply with numerical and physical constraints associated with the PDE to be ...seismic-imaging for oil reservoir research ... Voir le document complet

... redatuming, a target oriented approach which consists in reducing the inverse problem to a smaller region of interest, is very ...to a new ...inadequate for imaging pur- poses ...requires ... Voir le document complet

... with a standard error S.E. = 0.0011 and a confidence interval ...Moreover, a good efficiency ...in a simulation, then the code has a bug and a replay of a selection of few ... Voir le document complet

... Conclusion Different ways to simulate forest canopies used in a radiative transfer model have been tested. Each representation needs different inputs and calibration efforts, and produces virtual scenes with ... Voir le document complet

... Development of borehole geophysics has recently focused on reservoir characterization. Within this effort, extensive full waveform acoustic surveys have demonstrated a [r] ... Voir le document complet

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